Thanks to Paul (OM0ET) for this vital accessory for all End Fed Halfwave Antenna Systems--a 49:1 UnUn.
Paul takes us step-by-step through the design, building, and testing phase of this UnUn.
As designed, this UnUn will enable operations on the 40m-20m-15m-and 10m Amateur Radio Bands.
If you can't see the video, please insert this title URL into your browsers search box: https://www.youtube.com/watch?v=z-_2aBqcjI8
Here are a few comments from Paul (OM0ET):
CORRECTION: Toroid core is used FT240-43 (not 140-43) My new home made Multiband End Fed Half Wave Antenna which has been designed mainly for 40M band (7MHz), but this antenna tunes also on 20M-15M-10M without any traps or additional coils. This antenna is made for 100W RF input power and is 19,129m long. SWR on 40M band is 1:1.1 within the phone section and less than 1:1.5 within a whole band. The 49:1 UNUN box is weather proof and all holes for components I drilled were sealed against the water. On the end of the video you can see also an extreme weather followed the next day :D Please, if you like my video don't forget to subscribe to my channel and hit the bell button to not miss any of a new video or livestream ๐๐ Thank you for watching and 73! Paul. #efhw #antenna #homemade ----- Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).
